Metallica played their own version of 'The Star-Spangled Banner' at a US baseball game yesterday evening (May 3) - scroll down to the bottom of the page and click to watch.

The metal titans were guests at the AT&T park in San Francisco to watch the MLB game between the San Francisco Giants and the LA Dodgers, according to Antiquiet, and performed a heavy rendition of the US national anthem for the crowd. Their version of the song did not feature any lyrics - in January 2012, a US senator submitted a bill calling for artists who alter the lyrics of 'The Star-Spangled Banner' to be fined if they changed the words.

Metallica's second annual music festival - Orion Music + More - will take place in Detroit on June 8 and 9 this summer. Red Hot Chili Peppers, Foals and Deftones have already been lined up for the bash alongside Death Grips, Japandroids, Rise Against, Dropkick Murpys and The Joy Formidable.

Last year's inaugural event, which took place Atlantic City in New Jersey, saw Metallica headlining both nights of the festival, performing 1984's 'Ride The Lightning' and 1991's 'Metallica' in full. Other bands on the bill included Arctic Monkeys, Best Coast and Modest Mouse.

The band are also currently working on a new album. They plan to release the follow-up to their last album, 2008's 'Death Magnetic', in 2014. Talking about the recording process, Ulrich revealed in a recent interview: "The stuff that we were banging out yesterday, it felt heavy, it felt energetic, it was loud, it was fast, it was rocking, it was crazy… The snare drum was on there and there were guitar solos, in case anybody was wondering.''